Mechanical calculator



July 26, w49. o. G. RUDE 2,477,392

MECHANICAL CALCULATOR Filed June l0, 1946 3 Sheets-Sheet `l I m'enlnr Z e @.u e

tlnrne'vs July 26,1949- ,i I O. G. RUDE 2,477,392

MECHANICAL CALCULATOR Filed June l0, 1946 I 3 Sheets-Sheet 2 7;- gl C i /5 tlorlleys July 26, 1949. o. G. RUDE MECHANICAL CALCULATOR 3 Sheets-Sheet 5 Filed June 10, 1946 \w\ hm/U7 l 1M .wm Wm/mm @Kl u m m w... .L u R. o EN o\mN j@ a. www um um. mi um e Z L o om om o mh, 24mm oz( P m1 N||| llmdwlhwml 1,1m MIP S *N l l NN .m lw, AN B %w N ww .m @N EN \M\ Rw W QN Patented July 26, 1949 UNITED STATES PATENT OFFICE MECHANICAL CALCULATOR Ole G. Rude, Sacred Heart, Minn. Application June 10, 1946, Serial No. 675,686

2 Claims. 1

This invention relates to a machine for rapidly calculating the number of bushels that a given number of pounds of a particular commodity will equal and is especially intended and adapted for converting pounds of various grains to bushels where grain lin handled in small quantities, such as a grain elevator or country mill. Another object of the invention is to provide a machine including a rotatable drum containing the indicia for converting such items as wheat, beans, oats, barley, corn, flax and rye from pounds to bushels and which is operable within a fixed cylinder having a Window through which portions of the indicia bearing part of the drum is visible and is provided with additional indicia for calculating fractions of a bushel.

Still another aim of the invention is to provide a machine of the above described character includingr a rotatable drum which is so balanced that it can be manually revolved very readily,

i but will remain in any position in which it is set so that the indicia bearing parts thereof to be used will remain exposed in the window and relatively to an index line thereof, once the drum has been correctly positioned.

Other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings, which illustrate a preferred embodiment thereof, and wherein- Figure l is a top plan view of the machine in its entirety;

Figure 2 is an end View in elevation thereof;

Figure 3 is a transverse sectional view thereof;

Figure 4 is a longitudinal, substantially central sectional view thereof;

Figure 5 is an enlarged fragmentary plan View of the machine', and

Figure 6 is an enlarged fragmentary longitudinal sectional view thereof.

Referring more specifically to the drawings, the machine in its entirety is designated generally 'I and includes the cylider, designated generally 8, which includes relatively thick disks forming the end walls 9 thereof, and an elongated strip of metal or other suitable material Ill which is arcuate in cross section and which extends substantially around the disk 9 and which is secured at its ends thereto, by suitable fastenings II. The longitudinal edges of the strip I0 are folded inwardly twice, as best seen in Figure 3, to form inwardly opening channels I2 which are adapted to receive the longitudinal edges of a transparent strip I3 which forms the window of the cylinder 8 andV which extends substantially the length thereof. Opaque strip I4 is disposed beneath a portion of the transparent strip I3 and has one longitudinal edge portion located in the lower channel I2 and with the other edge portion thereof exposed. Additional fastenings II extend.A

through the lower channel I2, and the portions of the strips I3 and irl which are engaged therein and said fastenings are anchored in the end walls or disks 9 for clamping said portions I3 and I4 in the lower channel I2. An opaque index strip I5 is disposed under the upper portion of the Window I3 and has its upper longitudinal edge portion disposed in the upper channel I2 and said portion and the upper edge of the window I3 are similarly fixed in the upper channel I2 by additional fastenings II which extend therethrough and are anchored in the cylinder ends a. As seen in Figure l, additional fastenings II may extend through the end portions of the window I3 and the opaque strips I4 and I5 for securing said end portions to the disk 9.

The cylinder 8 is provided with supporting members I6 which are fastened to the outer side of the cylinder ends 9, and which are provided with depending outturned feet I'l, which are apertured to receive fastenings I8 for securing the feet to a suitable Supporting surface for fixedly mounting the `machine 'I and with the cylinder 8 thereof in a slightly elevated position.

A shaft I9 extends axially through the cylinder 8 and has portions thereof journaled in bushings 29 which are contained in axial openings 2I of the disks 9. The shaft I9 also extends rotatably through openings 22 in the upper portions of the support I6. Hand wheels 23 are detachably keyed to the protruding ends of the shaft I9, for a purpose which will hereinafter be apparent.

A hollow drum, designated generally 24, 1s rotatably supported in the cylinder 8 on the shaft I9 and includes a pair of disk members 25 through which the shaft I9 axially extends and which are keyed thereto by keys 26. A hollow cylindrical wall 21 is disposed with its ends engaging around the peripheries of the disk members 25 and may be secured thereto in any suitable manner. An indicia bearing sheet 28, of any suitable material, is wrapped around the outer side of the cylindrical wall 21 and the ends thereof are fastened in overlapping relationship thereto, by suitable fastenings 29, as seen in Figures 3 and 5. The sheet 28 is of the same width as the length of the drum 24 and the ends thereof are attached to the drum by additional fastenings 29 which extend through the cylindrical wall 21 and into the disk members 25, as seen in Figure 4.

As seen in Figures l and 5, the upper side of the fixed index strip I5 contains suitable indicia 30 which is visible through the window I3 and which includes various sections relating to the number of pounds equaling a bushel, and it will be noted that this indicia sets forth the ratios of wheat and beans as pounds to a bushel, oats 32 pounds to a bushel, barley 48 pounds to a bushel, and com, flax and :rye as 56 pounds to a bushel.

28, which vcolumns -S extendzcircumferentially .3

around the sheet 28.

As seen in Figure 5, the indicia on the outer side of the chart orsheet 28 and forming1 the columns 3l also are arranged in lines lengthwise of the machine and parallel to the upper edge of at-its endsto the said disks and extending sub- Stantiallytherearound, the longitudinal edges of the guide strip M. l

The upper row of gurea, directly .below .the connected ends of the chart 28 begins in the third column and beneath the indicia l@ of. theindicia bearing section 30 entitled Wheat and Beans and this rst row ofngures bears the same value masthe numerals 10,`20, 30 etc, previously referred to on the index strip l5 up throughY 50.

"The column under-,the numeral is inscribed f1-00 indicating that 50 pounds represents one;y 20

bushel and the following three columns aredesig- -nated 1-10 1-20 1-30 indicating that 70 pounds represents onebushel and v10 pounds-80 Y pounds, one bushel and 20 pounds, and 90 pounds,

one bushel and 30 pounds.

. imeralsofthe chart 28 located beneath the-other V'sections of the indicia-30 are also numbered in the same manner, but-to reect the ratio between Afthe number of pounds'and'V bushels, so that for v`oats, lweighing '32 pounds-to thebushelyunder the 130 :ing that 40 pounds-equals one bushel and 8 pounds, rhe secondrow of figures begins with snumber thereof inzheavytype is the number ;100 A and the number thereafteris 1-40, 'indica-ting i110, is 1-50 indicating that 110 pounds equals one 40 that l pounds equals one bushel plus 40 pounds.

The indiciasin the. column beneathv the numeral bushel 50 pounds, andtheneXt-.indiciais 2-00 in- Idicating. that v120 bushels.

v ythe chart extending.

V thereof beginning vwith pou-nds represents exactly two One half of the irst portion ofrthefindicia'of through 999, and'the: next section the numeral-1000.in the chart Z8 contains twenty left-hand column. The

of saidsections .and beginningzwiththe vsection covering 100G-20.00 alarge, indexnumber=l, '50

not shown is provided intermediate of Vt;he ends f of the chart and-for the ,next section Yextending i from 2000 .to-30,00 .bearsftheaindexnumber V2. i The last section bearstheindexnumber 19 as seen at 32 in` Figure 1.

`through 19V provides aready meansv for quickly setting the drum 24. for securing thezdesiredread- Ling.

The upper exposed edge ofthe opaque indexfingor guide strip "I4 provides a ready guide liney'ff50 Ifor separatingv the longitudinal rows of numbers -on the chart 28 so that the drum: 24 can Vbe posi- -ationed so .that the operator .may look along the "desired .line directly overfthe .upper edge .ofg the :ropaque strip Ul, as illustratedinFigure. 5...and5- r any position at.

quickly'and accurately secure a desired-reading flfor convertingpoundsto bushels of any of the zitems listed up to and including 120,000- pounds. The=drum 2A is so balanced that it willmaintain may set thefdrum with therassurance that it'will {remain in set position .:;moved.

until againA manually Vbers V*forming member of arcuate crosssectionzafastenedat its 28 is shown in" Figure 5,. said 'portion-H45 fsubstantially parallel .relationship to:-iorm an 'Thesefindexnumbers 1' 55 being. adapted to contain'findiciaon the :external side thereof.

whichit is set so that'the user 57 ing a substantially cylindrical housing including `.disk-.members forming the ends thereof and an opaque member of arcuate cross section fastened said arcuate member being folded inwardly and .xforming opposed outwardly opening channels for 15 .fstrip formingl a windowand Acombiningtherewith y to form the cylindrical side wallof the. housing, fan elongated opaque index stripV -havingfone longitudinal edge portion clamped:ini one oftthe engaging the longitudinal edges of a transparent channels of said arcuate member'and positioned thereby beneath one longitudinal edge fporton of said window-,v saidhousing vbeing* adapted* to con- =tain a drum rotatably-disposed therein; andesaid window being-.adapted to -expose4 indiciaaon the periphery of the drum as itgis revolvedaainztthe housing.

2. l In a calculating machinecasing; aa'substantially cylindrical-housingffincludingxi igskmem the ends thereof .A and' farr.-l opaque ends to saidv disks andextendingrfsubstantially therearound, the longitudinal-'-eclgesfY of @said arcuate memberbeing folded inwardly .and -formf ing opposed outwardly opening channels,` .':an elongated` transparent strip'extendingzthe length =of said arcuatemembergand having its` longiitudinal edges .clamped inY said channels to form a-.window and combiningv with said arcuategmemberY to form the cylindricalv side wall: of-'thehdusing, an elongated aopadue,- indexV strip supported VvIcy-each of` said channels, saidstripsabeingfdisposed inwardly of the transparentstripzand -`each having a longitudinal .edge -anchored:-.in-.:one:of the channels, the 4opposite vlongitudinalf.edges.fof said index strips being disposed in spacedapart portionof` theftransparent strip located between the adjacent edges `of the opaque; index:v strips being adapted to exposeportions. of indiciaon `the periphery-of the drumwas'it is Prevolved in the housing, and the adjaeentgsubstantially parallel` edges-of -saidindexingstrips forming indexing lines, one orf-,both-.ofisaid indexingfstrips `OLE-G;y RUDE.

REFERENCES CITED The following Yreferences are "of recordin the le of this.. patent:

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